So i have two nodes, 1-1 NIC for DRBD replication, ietd to connect the storage and heartbeat to keep them in sync.Everything works fine, a tested it with restarting heartbeat as written in the last point. i was watching /proc/net/ietd/session, and the change is OK, the session builds up very quick. The problem comes when i restart the passive node . The connection to the storage still works, but if i restart heartbeat again to give control to the system i have rebooted i have to wait for ietd for about 20-30 sec. in this period the sessions build up, and the connection works again but very slow. After this first change will the change fast again untill i reboot one node... I made logs when i restarted heartbeat after boot and one of the heartbeat restart after. I was looking for differences in these logs but found nothing. Do you have any idea why the session build up so slow in the first heartbeat restart?thanks for your help